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847 lines
27 KiB
C++
847 lines
27 KiB
C++
#pragma once
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <DataTypes/DataTypeArray.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <Columns/ColumnArray.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnVector.h>
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#include <Common/ArenaAllocator.h>
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#include <Common/assert_cast.h>
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#include <AggregateFunctions/IAggregateFunction.h>
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#include <type_traits>
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#define AGGREGATE_FUNCTION_GROUP_ARRAY_MAX_ARRAY_SIZE 0xFFFFFF
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int TOO_LARGE_ARRAY_SIZE;
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}
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enum class Sampler
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{
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NONE,
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RNG,
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DETERMINATOR // TODO
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};
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template <bool Thas_limit, Sampler Tsampler>
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struct GroupArrayTrait
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{
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static constexpr bool has_limit = Thas_limit;
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static constexpr Sampler sampler = Tsampler;
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};
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template <typename Trait>
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static constexpr const char * getNameByTrait()
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{
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if (Trait::sampler == Sampler::NONE)
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return "groupArray";
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else if (Trait::sampler == Sampler::RNG)
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return "groupArraySample";
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// else if (Trait::sampler == Sampler::DETERMINATOR) // TODO
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__builtin_unreachable();
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}
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template <typename T>
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struct GroupArraySamplerData
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{
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// Switch to ordinary Allocator after 4096 bytes to avoid fragmentation and trash in Arena
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using Allocator = MixedAlignedArenaAllocator<alignof(T), 4096>;
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using Array = PODArray<T, 32, Allocator>;
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Array value;
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size_t total_values = 0;
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pcg32_fast rng;
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UInt64 genRandom(size_t lim)
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{
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/// With a large number of values, we will generate random numbers several times slower.
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if (lim <= static_cast<UInt64>(rng.max()))
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return static_cast<UInt32>(rng()) % static_cast<UInt32>(lim);
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else
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return (static_cast<UInt64>(rng()) * (static_cast<UInt64>(rng.max()) + 1ULL) + static_cast<UInt64>(rng())) % lim;
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}
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void randomShuffle()
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{
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for (size_t i = 1; i < value.size(); ++i)
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{
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size_t j = genRandom(i + 1);
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std::swap(value[i], value[j]);
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}
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}
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};
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/// A particular case is an implementation for numeric types.
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template <typename T, bool has_sampler>
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struct GroupArrayNumericData;
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template <typename T>
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struct GroupArrayNumericData<T, false>
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{
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// Switch to ordinary Allocator after 4096 bytes to avoid fragmentation and trash in Arena
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using Allocator = MixedAlignedArenaAllocator<alignof(T), 4096>;
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using Array = PODArray<T, 32, Allocator>;
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Array value;
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};
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template <typename T>
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struct GroupArrayNumericData<T, true> : public GroupArraySamplerData<T>
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{
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};
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template <typename T, typename Trait>
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class GroupArrayNumericImpl final
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: public IAggregateFunctionDataHelper<GroupArrayNumericData<T, Trait::sampler != Sampler::NONE>, GroupArrayNumericImpl<T, Trait>>
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{
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using Data = GroupArrayNumericData<T, Trait::sampler != Sampler::NONE>;
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static constexpr bool limit_num_elems = Trait::has_limit;
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DataTypePtr & data_type;
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UInt64 max_elems;
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UInt64 seed;
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public:
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explicit GroupArrayNumericImpl(
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const DataTypePtr & data_type_, UInt64 max_elems_ = std::numeric_limits<UInt64>::max(), UInt64 seed_ = 123456)
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: IAggregateFunctionDataHelper<GroupArrayNumericData<T, Trait::sampler != Sampler::NONE>, GroupArrayNumericImpl<T, Trait>>(
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{data_type_}, {})
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, data_type(this->argument_types[0])
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, max_elems(max_elems_)
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, seed(seed_)
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{
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}
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String getName() const override { return getNameByTrait<Trait>(); }
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DataTypePtr getReturnType() const override { return std::make_shared<DataTypeArray>(data_type); }
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void insert(Data & a, const T & v, Arena * arena) const
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{
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++a.total_values;
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if (a.value.size() < max_elems)
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a.value.push_back(v, arena);
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else
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{
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UInt64 rnd = a.genRandom(a.total_values);
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if (rnd < max_elems)
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a.value[rnd] = v;
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}
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}
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void create(AggregateDataPtr place) const override
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{
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[[maybe_unused]] auto a = new (place) Data;
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if constexpr (Trait::sampler == Sampler::RNG)
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a->rng.seed(seed);
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}
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void add(AggregateDataPtr place, const IColumn ** columns, size_t row_num, Arena * arena) const override
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{
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if constexpr (Trait::sampler == Sampler::NONE)
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{
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if (limit_num_elems && this->data(place).value.size() >= max_elems)
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return;
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this->data(place).value.push_back(assert_cast<const ColumnVector<T> &>(*columns[0]).getData()[row_num], arena);
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}
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if constexpr (Trait::sampler == Sampler::RNG)
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{
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auto & a = this->data(place);
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++a.total_values;
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if (a.value.size() < max_elems)
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a.value.push_back(assert_cast<const ColumnVector<T> &>(*columns[0]).getData()[row_num], arena);
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else
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{
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UInt64 rnd = a.genRandom(a.total_values);
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if (rnd < max_elems)
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a.value[rnd] = assert_cast<const ColumnVector<T> &>(*columns[0]).getData()[row_num];
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}
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}
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// TODO
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// if constexpr (Trait::sampler == Sampler::DETERMINATOR)
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}
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void merge(AggregateDataPtr place, ConstAggregateDataPtr rhs, Arena * arena) const override
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{
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if constexpr (Trait::sampler == Sampler::NONE)
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{
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auto & cur_elems = this->data(place);
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auto & rhs_elems = this->data(rhs);
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if (!limit_num_elems)
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{
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if (rhs_elems.value.size())
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cur_elems.value.insert(rhs_elems.value.begin(), rhs_elems.value.end(), arena);
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}
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else
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{
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UInt64 elems_to_insert = std::min(static_cast<size_t>(max_elems) - cur_elems.value.size(), rhs_elems.value.size());
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if (elems_to_insert)
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cur_elems.value.insert(rhs_elems.value.begin(), rhs_elems.value.begin() + elems_to_insert, arena);
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}
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}
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if constexpr (Trait::sampler == Sampler::RNG)
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{
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if (this->data(rhs).value.empty()) /// rhs state is empty
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return;
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auto & a = this->data(place);
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auto & b = this->data(rhs);
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if (b.total_values <= max_elems)
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{
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for (size_t i = 0; i < b.value.size(); ++i)
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insert(a, b.value[i], arena);
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}
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else if (a.total_values <= max_elems)
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{
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decltype(a.value) from;
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from.swap(a.value, arena);
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a.value.assign(b.value.begin(), b.value.end(), arena);
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a.total_values = b.total_values;
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for (size_t i = 0; i < from.size(); ++i)
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insert(a, from[i], arena);
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}
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else
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{
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a.randomShuffle();
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a.total_values += b.total_values;
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for (size_t i = 0; i < max_elems; ++i)
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{
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UInt64 rnd = a.genRandom(a.total_values);
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if (rnd < b.total_values)
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a.value[i] = b.value[i];
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}
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}
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}
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// TODO
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// if constexpr (Trait::sampler == Sampler::DETERMINATOR)
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}
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void serialize(ConstAggregateDataPtr place, WriteBuffer & buf) const override
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{
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const auto & value = this->data(place).value;
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size_t size = value.size();
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writeVarUInt(size, buf);
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buf.write(reinterpret_cast<const char *>(value.data()), size * sizeof(value[0]));
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if constexpr (Trait::sampler == Sampler::RNG)
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{
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DB::writeIntBinary<size_t>(this->data(place).total_values, buf);
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std::ostringstream rng_stream;
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rng_stream << this->data(place).rng;
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DB::writeStringBinary(rng_stream.str(), buf);
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}
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// TODO
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// if constexpr (Trait::sampler == Sampler::DETERMINATOR)
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}
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void deserialize(AggregateDataPtr place, ReadBuffer & buf, Arena * arena) const override
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{
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size_t size = 0;
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readVarUInt(size, buf);
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if (unlikely(size > AGGREGATE_FUNCTION_GROUP_ARRAY_MAX_ARRAY_SIZE))
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throw Exception("Too large array size", ErrorCodes::TOO_LARGE_ARRAY_SIZE);
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if (limit_num_elems && unlikely(size > max_elems))
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throw Exception("Too large array size, it should not exceed " + toString(max_elems), ErrorCodes::TOO_LARGE_ARRAY_SIZE);
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auto & value = this->data(place).value;
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value.resize(size, arena);
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buf.read(reinterpret_cast<char *>(value.data()), size * sizeof(value[0]));
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if constexpr (Trait::sampler == Sampler::RNG)
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{
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DB::readIntBinary<size_t>(this->data(place).total_values, buf);
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std::string rng_string;
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DB::readStringBinary(rng_string, buf);
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std::istringstream rng_stream(rng_string);
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rng_stream >> this->data(place).rng;
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}
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// TODO
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// if constexpr (Trait::sampler == Sampler::DETERMINATOR)
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}
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void insertResultInto(ConstAggregateDataPtr place, IColumn & to) const override
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{
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const auto & value = this->data(place).value;
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size_t size = value.size();
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ColumnArray & arr_to = assert_cast<ColumnArray &>(to);
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ColumnArray::Offsets & offsets_to = arr_to.getOffsets();
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offsets_to.push_back(offsets_to.back() + size);
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if (size)
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{
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typename ColumnVector<T>::Container & data_to = assert_cast<ColumnVector<T> &>(arr_to.getData()).getData();
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data_to.insert(this->data(place).value.begin(), this->data(place).value.end());
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}
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}
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bool allocatesMemoryInArena() const override { return true; }
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};
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/// General case
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/// Nodes used to implement a linked list for storage of groupArray states
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template <typename Node>
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struct GroupArrayNodeBase
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{
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UInt64 size; // size of payload
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/// Returns pointer to actual payload
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char * data() { return reinterpret_cast<char *>(this) + sizeof(Node); }
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const char * data() const { return reinterpret_cast<const char *>(this) + sizeof(Node); }
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/// Clones existing node (does not modify next field)
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Node * clone(Arena * arena) const
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{
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return reinterpret_cast<Node *>(
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const_cast<char *>(arena->alignedInsert(reinterpret_cast<const char *>(this), sizeof(Node) + size, alignof(Node))));
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}
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/// Write node to buffer
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void write(WriteBuffer & buf) const
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{
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writeVarUInt(size, buf);
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buf.write(data(), size);
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}
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/// Reads and allocates node from ReadBuffer's data (doesn't set next)
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static Node * read(ReadBuffer & buf, Arena * arena)
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{
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UInt64 size;
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readVarUInt(size, buf);
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Node * node = reinterpret_cast<Node *>(arena->alignedAlloc(sizeof(Node) + size, alignof(Node)));
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node->size = size;
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buf.read(node->data(), size);
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return node;
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}
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};
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struct GroupArrayNodeString : public GroupArrayNodeBase<GroupArrayNodeString>
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{
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using Node = GroupArrayNodeString;
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/// Create node from string
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static Node * allocate(const IColumn & column, size_t row_num, Arena * arena)
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{
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StringRef string = assert_cast<const ColumnString &>(column).getDataAt(row_num);
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Node * node = reinterpret_cast<Node *>(arena->alignedAlloc(sizeof(Node) + string.size, alignof(Node)));
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node->size = string.size;
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memcpy(node->data(), string.data, string.size);
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return node;
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}
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void insertInto(IColumn & column)
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{
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assert_cast<ColumnString &>(column).insertData(data(), size);
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}
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};
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struct GroupArrayNodeGeneral : public GroupArrayNodeBase<GroupArrayNodeGeneral>
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{
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using Node = GroupArrayNodeGeneral;
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static Node * allocate(const IColumn & column, size_t row_num, Arena * arena)
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{
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const char * begin = arena->alignedAlloc(sizeof(Node), alignof(Node));
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StringRef value = column.serializeValueIntoArena(row_num, *arena, begin);
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Node * node = reinterpret_cast<Node *>(const_cast<char *>(begin));
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node->size = value.size;
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return node;
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}
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void insertInto(IColumn & column) { column.deserializeAndInsertFromArena(data()); }
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};
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template <typename Node, bool has_sampler>
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struct GroupArrayGeneralData;
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template <typename Node>
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struct GroupArrayGeneralData<Node, false>
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{
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// Switch to ordinary Allocator after 4096 bytes to avoid fragmentation and trash in Arena
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using Allocator = MixedAlignedArenaAllocator<alignof(Node *), 4096>;
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using Array = PODArray<Node *, 32, Allocator>;
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Array value;
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};
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template <typename Node>
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struct GroupArrayGeneralData<Node, true> : public GroupArraySamplerData<Node *>
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{
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};
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/// Implementation of groupArray for String or any ComplexObject via Array
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template <typename Node, typename Trait>
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class GroupArrayGeneralImpl final
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: public IAggregateFunctionDataHelper<GroupArrayGeneralData<Node, Trait::sampler != Sampler::NONE>, GroupArrayGeneralImpl<Node, Trait>>
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{
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static constexpr bool limit_num_elems = Trait::has_limit;
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using Data = GroupArrayGeneralData<Node, Trait::sampler != Sampler::NONE>;
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static Data & data(AggregateDataPtr place) { return *reinterpret_cast<Data *>(place); }
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static const Data & data(ConstAggregateDataPtr place) { return *reinterpret_cast<const Data *>(place); }
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DataTypePtr & data_type;
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UInt64 max_elems;
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UInt64 seed;
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public:
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GroupArrayGeneralImpl(const DataTypePtr & data_type_, UInt64 max_elems_ = std::numeric_limits<UInt64>::max(), UInt64 seed_ = 123456)
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: IAggregateFunctionDataHelper<GroupArrayGeneralData<Node, Trait::sampler != Sampler::NONE>, GroupArrayGeneralImpl<Node, Trait>>(
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{data_type_}, {})
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, data_type(this->argument_types[0])
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, max_elems(max_elems_)
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, seed(seed_)
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{
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}
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String getName() const override { return getNameByTrait<Trait>(); }
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DataTypePtr getReturnType() const override { return std::make_shared<DataTypeArray>(data_type); }
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void insert(Data & a, const Node * v, Arena * arena) const
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{
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++a.total_values;
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if (a.value.size() < max_elems)
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a.value.push_back(v->clone(arena), arena);
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else
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{
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UInt64 rnd = a.genRandom(a.total_values);
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if (rnd < max_elems)
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a.value[rnd] = v->clone(arena);
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}
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}
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void create(AggregateDataPtr place) const override
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{
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[[maybe_unused]] auto a = new (place) Data;
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if constexpr (Trait::sampler == Sampler::RNG)
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a->rng.seed(seed);
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}
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void add(AggregateDataPtr place, const IColumn ** columns, size_t row_num, Arena * arena) const override
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{
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if constexpr (Trait::sampler == Sampler::NONE)
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{
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if (limit_num_elems && data(place).value.size() >= max_elems)
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return;
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Node * node = Node::allocate(*columns[0], row_num, arena);
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data(place).value.push_back(node, arena);
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}
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if constexpr (Trait::sampler == Sampler::RNG)
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{
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auto & a = data(place);
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++a.total_values;
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if (a.value.size() < max_elems)
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a.value.push_back(Node::allocate(*columns[0], row_num, arena), arena);
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else
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{
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UInt64 rnd = a.genRandom(a.total_values);
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if (rnd < max_elems)
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a.value[rnd] = Node::allocate(*columns[0], row_num, arena);
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}
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}
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// TODO
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// if constexpr (Trait::sampler == Sampler::DETERMINATOR)
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}
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void merge(AggregateDataPtr place, ConstAggregateDataPtr rhs, Arena * arena) const override
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{
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if constexpr (Trait::sampler == Sampler::NONE)
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mergeNoSampler(place, rhs, arena);
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else if constexpr (Trait::sampler == Sampler::RNG)
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mergeWithRNGSampler(place, rhs, arena);
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// TODO
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// else if constexpr (Trait::sampler == Sampler::DETERMINATOR)
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}
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void ALWAYS_INLINE mergeNoSampler(AggregateDataPtr place, ConstAggregateDataPtr rhs, Arena * arena) const
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{
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if (data(rhs).value.empty()) /// rhs state is empty
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return;
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UInt64 new_elems;
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if (limit_num_elems)
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{
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if (data(place).value.size() >= max_elems)
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return;
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new_elems = std::min(data(rhs).value.size(), static_cast<size_t>(max_elems) - data(place).value.size());
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}
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|
else
|
|
new_elems = data(rhs).value.size();
|
|
|
|
auto & a = data(place).value;
|
|
auto & b = data(rhs).value;
|
|
for (UInt64 i = 0; i < new_elems; ++i)
|
|
a.push_back(b[i]->clone(arena), arena);
|
|
}
|
|
|
|
void ALWAYS_INLINE mergeWithRNGSampler(AggregateDataPtr place, ConstAggregateDataPtr rhs, Arena * arena) const
|
|
{
|
|
if (data(rhs).value.empty()) /// rhs state is empty
|
|
return;
|
|
|
|
auto & a = data(place);
|
|
auto & b = data(rhs);
|
|
|
|
if (b.total_values <= max_elems)
|
|
{
|
|
for (size_t i = 0; i < b.value.size(); ++i)
|
|
insert(a, b.value[i], arena);
|
|
}
|
|
else if (a.total_values <= max_elems)
|
|
{
|
|
decltype(a.value) from;
|
|
from.swap(a.value, arena);
|
|
for (auto & node : b.value)
|
|
a.value.push_back(node->clone(arena), arena);
|
|
a.total_values = b.total_values;
|
|
for (size_t i = 0; i < from.size(); ++i)
|
|
insert(a, from[i], arena);
|
|
}
|
|
else
|
|
{
|
|
a.randomShuffle();
|
|
a.total_values += b.total_values;
|
|
for (size_t i = 0; i < max_elems; ++i)
|
|
{
|
|
UInt64 rnd = a.genRandom(a.total_values);
|
|
if (rnd < b.total_values)
|
|
a.value[i] = b.value[i]->clone(arena);
|
|
}
|
|
}
|
|
}
|
|
|
|
void serialize(ConstAggregateDataPtr place, WriteBuffer & buf) const override
|
|
{
|
|
writeVarUInt(data(place).value.size(), buf);
|
|
|
|
auto & value = data(place).value;
|
|
for (auto & node : value)
|
|
node->write(buf);
|
|
|
|
if constexpr (Trait::sampler == Sampler::RNG)
|
|
{
|
|
DB::writeIntBinary<size_t>(data(place).total_values, buf);
|
|
std::ostringstream rng_stream;
|
|
rng_stream << data(place).rng;
|
|
DB::writeStringBinary(rng_stream.str(), buf);
|
|
}
|
|
|
|
// TODO
|
|
// if constexpr (Trait::sampler == Sampler::DETERMINATOR)
|
|
}
|
|
|
|
void deserialize(AggregateDataPtr place, ReadBuffer & buf, Arena * arena) const override
|
|
{
|
|
UInt64 elems;
|
|
readVarUInt(elems, buf);
|
|
|
|
if (unlikely(elems == 0))
|
|
return;
|
|
|
|
if (unlikely(elems > AGGREGATE_FUNCTION_GROUP_ARRAY_MAX_ARRAY_SIZE))
|
|
throw Exception("Too large array size", ErrorCodes::TOO_LARGE_ARRAY_SIZE);
|
|
|
|
if (limit_num_elems && unlikely(elems > max_elems))
|
|
throw Exception("Too large array size, it should not exceed " + toString(max_elems), ErrorCodes::TOO_LARGE_ARRAY_SIZE);
|
|
|
|
auto & value = data(place).value;
|
|
|
|
value.resize(elems, arena);
|
|
for (UInt64 i = 0; i < elems; ++i)
|
|
value[i] = Node::read(buf, arena);
|
|
|
|
if constexpr (Trait::sampler == Sampler::RNG)
|
|
{
|
|
DB::readIntBinary<size_t>(data(place).total_values, buf);
|
|
std::string rng_string;
|
|
DB::readStringBinary(rng_string, buf);
|
|
std::istringstream rng_stream(rng_string);
|
|
rng_stream >> data(place).rng;
|
|
}
|
|
|
|
// TODO
|
|
// if constexpr (Trait::sampler == Sampler::DETERMINATOR)
|
|
}
|
|
|
|
void insertResultInto(ConstAggregateDataPtr place, IColumn & to) const override
|
|
{
|
|
auto & column_array = assert_cast<ColumnArray &>(to);
|
|
|
|
auto & offsets = column_array.getOffsets();
|
|
offsets.push_back(offsets.back() + data(place).value.size());
|
|
|
|
auto & column_data = column_array.getData();
|
|
|
|
if (std::is_same_v<Node, GroupArrayNodeString>)
|
|
{
|
|
auto & string_offsets = assert_cast<ColumnString &>(column_data).getOffsets();
|
|
string_offsets.reserve(string_offsets.size() + data(place).value.size());
|
|
}
|
|
|
|
auto & value = data(place).value;
|
|
for (auto & node : value)
|
|
node->insertInto(column_data);
|
|
}
|
|
|
|
bool allocatesMemoryInArena() const override { return true; }
|
|
};
|
|
|
|
template <typename Node>
|
|
struct GroupArrayListNodeBase : public GroupArrayNodeBase<Node>
|
|
{
|
|
Node * next;
|
|
};
|
|
|
|
struct GroupArrayListNodeString : public GroupArrayListNodeBase<GroupArrayListNodeString>
|
|
{
|
|
using Node = GroupArrayListNodeString;
|
|
|
|
/// Create node from string
|
|
static Node * allocate(const IColumn & column, size_t row_num, Arena * arena)
|
|
{
|
|
StringRef string = assert_cast<const ColumnString &>(column).getDataAt(row_num);
|
|
|
|
Node * node = reinterpret_cast<Node *>(arena->alignedAlloc(sizeof(Node) + string.size, alignof(Node)));
|
|
node->next = nullptr;
|
|
node->size = string.size;
|
|
memcpy(node->data(), string.data, string.size);
|
|
|
|
return node;
|
|
}
|
|
|
|
void insertInto(IColumn & column) { assert_cast<ColumnString &>(column).insertData(data(), size); }
|
|
};
|
|
|
|
struct GroupArrayListNodeGeneral : public GroupArrayListNodeBase<GroupArrayListNodeGeneral>
|
|
{
|
|
using Node = GroupArrayListNodeGeneral;
|
|
|
|
static Node * allocate(const IColumn & column, size_t row_num, Arena * arena)
|
|
{
|
|
const char * begin = arena->alignedAlloc(sizeof(Node), alignof(Node));
|
|
StringRef value = column.serializeValueIntoArena(row_num, *arena, begin);
|
|
|
|
Node * node = reinterpret_cast<Node *>(const_cast<char *>(begin));
|
|
node->next = nullptr;
|
|
node->size = value.size;
|
|
|
|
return node;
|
|
}
|
|
|
|
void insertInto(IColumn & column) { column.deserializeAndInsertFromArena(data()); }
|
|
};
|
|
|
|
|
|
template <typename Node>
|
|
struct GroupArrayGeneralListData
|
|
{
|
|
UInt64 elems = 0;
|
|
Node * first = nullptr;
|
|
Node * last = nullptr;
|
|
};
|
|
|
|
|
|
/// Implementation of groupArray for String or any ComplexObject via linked list
|
|
/// It has poor performance in case of many small objects
|
|
template <typename Node, typename Trait>
|
|
class GroupArrayGeneralListImpl final
|
|
: public IAggregateFunctionDataHelper<GroupArrayGeneralListData<Node>, GroupArrayGeneralListImpl<Node, Trait>>
|
|
{
|
|
static constexpr bool limit_num_elems = Trait::has_limit;
|
|
using Data = GroupArrayGeneralListData<Node>;
|
|
static Data & data(AggregateDataPtr place) { return *reinterpret_cast<Data *>(place); }
|
|
static const Data & data(ConstAggregateDataPtr place) { return *reinterpret_cast<const Data *>(place); }
|
|
|
|
DataTypePtr & data_type;
|
|
UInt64 max_elems;
|
|
|
|
public:
|
|
GroupArrayGeneralListImpl(const DataTypePtr & data_type_, UInt64 max_elems_ = std::numeric_limits<UInt64>::max())
|
|
: IAggregateFunctionDataHelper<GroupArrayGeneralListData<Node>, GroupArrayGeneralListImpl<Node, Trait>>({data_type_}, {})
|
|
, data_type(this->argument_types[0])
|
|
, max_elems(max_elems_)
|
|
{
|
|
}
|
|
|
|
String getName() const override { return getNameByTrait<Trait>(); }
|
|
|
|
DataTypePtr getReturnType() const override { return std::make_shared<DataTypeArray>(data_type); }
|
|
|
|
void add(AggregateDataPtr place, const IColumn ** columns, size_t row_num, Arena * arena) const override
|
|
{
|
|
if (limit_num_elems && data(place).elems >= max_elems)
|
|
return;
|
|
|
|
Node * node = Node::allocate(*columns[0], row_num, arena);
|
|
|
|
if (unlikely(!data(place).first))
|
|
{
|
|
data(place).first = node;
|
|
data(place).last = node;
|
|
}
|
|
else
|
|
{
|
|
data(place).last->next = node;
|
|
data(place).last = node;
|
|
}
|
|
|
|
++data(place).elems;
|
|
}
|
|
|
|
void merge(AggregateDataPtr place, ConstAggregateDataPtr rhs, Arena * arena) const override
|
|
{
|
|
/// It is sadly, but rhs's Arena could be destroyed
|
|
|
|
if (!data(rhs).first) /// rhs state is empty
|
|
return;
|
|
|
|
UInt64 new_elems;
|
|
UInt64 cur_elems = data(place).elems;
|
|
if (limit_num_elems)
|
|
{
|
|
if (data(place).elems >= max_elems)
|
|
return;
|
|
|
|
new_elems = std::min(data(place).elems + data(rhs).elems, static_cast<size_t>(max_elems));
|
|
}
|
|
else
|
|
{
|
|
new_elems = data(place).elems + data(rhs).elems;
|
|
}
|
|
|
|
Node * p_rhs = data(rhs).first;
|
|
Node * p_lhs;
|
|
|
|
if (unlikely(!data(place).last)) /// lhs state is empty
|
|
{
|
|
p_lhs = p_rhs->clone(arena);
|
|
data(place).first = data(place).last = p_lhs;
|
|
p_rhs = p_rhs->next;
|
|
++cur_elems;
|
|
}
|
|
else
|
|
{
|
|
p_lhs = data(place).last;
|
|
}
|
|
|
|
for (; cur_elems < new_elems; ++cur_elems)
|
|
{
|
|
Node * p_new = p_rhs->clone(arena);
|
|
p_lhs->next = p_new;
|
|
p_rhs = p_rhs->next;
|
|
p_lhs = p_new;
|
|
}
|
|
|
|
p_lhs->next = nullptr;
|
|
data(place).last = p_lhs;
|
|
data(place).elems = new_elems;
|
|
}
|
|
|
|
void serialize(ConstAggregateDataPtr place, WriteBuffer & buf) const override
|
|
{
|
|
writeVarUInt(data(place).elems, buf);
|
|
|
|
Node * p = data(place).first;
|
|
while (p)
|
|
{
|
|
p->write(buf);
|
|
p = p->next;
|
|
}
|
|
}
|
|
|
|
void deserialize(AggregateDataPtr place, ReadBuffer & buf, Arena * arena) const override
|
|
{
|
|
UInt64 elems;
|
|
readVarUInt(elems, buf);
|
|
data(place).elems = elems;
|
|
|
|
if (unlikely(elems == 0))
|
|
return;
|
|
|
|
if (unlikely(elems > AGGREGATE_FUNCTION_GROUP_ARRAY_MAX_ARRAY_SIZE))
|
|
throw Exception("Too large array size", ErrorCodes::TOO_LARGE_ARRAY_SIZE);
|
|
|
|
if (limit_num_elems && unlikely(elems > max_elems))
|
|
throw Exception("Too large array size, it should not exceed " + toString(max_elems), ErrorCodes::TOO_LARGE_ARRAY_SIZE);
|
|
|
|
Node * prev = Node::read(buf, arena);
|
|
data(place).first = prev;
|
|
|
|
for (UInt64 i = 1; i < elems; ++i)
|
|
{
|
|
Node * cur = Node::read(buf, arena);
|
|
prev->next = cur;
|
|
prev = cur;
|
|
}
|
|
|
|
prev->next = nullptr;
|
|
data(place).last = prev;
|
|
}
|
|
|
|
void insertResultInto(ConstAggregateDataPtr place, IColumn & to) const override
|
|
{
|
|
auto & column_array = assert_cast<ColumnArray &>(to);
|
|
|
|
auto & offsets = column_array.getOffsets();
|
|
offsets.push_back(offsets.back() + data(place).elems);
|
|
|
|
auto & column_data = column_array.getData();
|
|
|
|
if (std::is_same_v<Node, GroupArrayListNodeString>)
|
|
{
|
|
auto & string_offsets = assert_cast<ColumnString &>(column_data).getOffsets();
|
|
string_offsets.reserve(string_offsets.size() + data(place).elems);
|
|
}
|
|
|
|
Node * p = data(place).first;
|
|
while (p)
|
|
{
|
|
p->insertInto(column_data);
|
|
p = p->next;
|
|
}
|
|
}
|
|
|
|
bool allocatesMemoryInArena() const override { return true; }
|
|
};
|
|
|
|
#undef AGGREGATE_FUNCTION_GROUP_ARRAY_MAX_ARRAY_SIZE
|
|
|
|
}
|